<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/react@17/umd/react.production.min.js" rel="external nofollow" rel="external nofollow"></script>
    <script src="https://unpkg.com/react-dom@17/umd/react-dom.production.min.js" rel="external nofollow" rel="external nofollow"></script>
    <script src="https://unpkg.com/babel-standalone@6/babel.min.js" rel="external nofollow" rel="external nofollow"></script>
</head>

<body>
    <div id="test"></div>
    <div id="demo"></div>
    <script type="text/babel">
        const VDOM=(
        <h1 id="title">
            <span>hello,React</span>
        </h1>
        ) ReactDOM.render(VDOM,document.getElementById('test')) const TDOM=document.getElementById('demo'); console.log('虚拟DOM',VDOM); console.log('真实DOM',TDOM);

    </script>
</body>

</html>